Tactile Dome at the Exploratorium
, 3601 Lyon Street
San Francisco, California

c (415) 561-0362

w http://www.exploratorium.edu/visit/tactile_dome/
Do The Exploratorium in general is a fantastic place to get your interactive science kicks, but the Tactile Dome in particular is fantastic. You'll crawl, fumble, and feel your way through a dark labyrinth. Every time I go, I find new things I'd never felt in there before.